%0 Journal Article %A Uwe Franz %A Adam Skalski %T A new characterisation of idempotent states on finite and compact quantum groups %J Comptes Rendus. Mathématique %D 2009 %P 991-996 %V 347 %N 17-18 %I Elsevier %R 10.1016/j.crma.2009.06.015 %G en %F CRMATH_2009__347_17-18_991_0